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Composite fasteners

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In a recent article, the subject of using fasteners for composite components was discussed. The number of components for which composites are considered is increasing considerably, and in some race series their use is limited by regulations. There are many areas in a Formula One engine, for example, where composites are expressly forbidden, but in production-based series, people are free to use composite components much more freely and so they have developed techniques to make their use...

Respondez s'il vous plait

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We've all received them at some time in our lives. That invitation to so-and-so's wedding that spreads mild panic in the household. A new outfit for the wife, a few modifications to the waistband of that old suit of mine, and the prospect of being away from the workshop for a whole weekend. At the bottom of the card the letters 'RSVP' demand an almost immediate reply and so inspiration for damage limitation has to come - and come quickly. But in the world of fuels, simply...

Pump gear teeth

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What is the difference between a gear tooth in a gearbox and that in an oil pump? In case you were expecting some form of witty answer I'm afraid I'll have to disappoint you. For although at first glance the two might appear to be the same, in reality the tasks they are being asked to undertake are very different. In the case of the transmission, the object is to transfer the tangential force from one rotating shaft to that of another, while for the pump it is not so much the...

Avoiding piston skirt wear

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One series where engines see tumultuous life is the World of Outlaws winged sprint car campaign in the US, with 60 contests coast to coast that keep competitors far away from their engine builders - sometimes for a month or more. So to help their customers in the field, Shaver Specialties Racing Engines (SSRE) of Torrance, California, chooses a robust Mahle Motorsports piston of 2618 alloy that's coated with phosphate; skirts are coated with Mahle Grafal. Shaver's operation,...

The Napier ring

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Mention the word 'Napier' to many people and the chances are you will be met with a quizzical stare. To some, mainly engineers and scientists with an interest in history, they will talk of John Napier, the 16th century scholar and inventor of logarithms. To others, Napier is associated with rather large, industrial-type turbochargers or the classic range of multi-cylinder piston aero engines that were around just before the jet engine took over, such as the iconic Napier W12 Lion or...